Variable exhaust of locomotive-engines



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WILLIAM S. G. BAKER, OF CHICAGO, ILLINOIS.

VARIABLE EXHAUST OF LOCOMOTIVE-ENGINES.

To all whom t may concern:

Be it known that I, W. S. G. BAKER, of Chicago, in the county of Cook and State of Illinois, have invented a new and Improved Variable Exhaust for Steam-Engines; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of this specification, in which" Figure l, represents a vertical transverse section ot' my exhaust, the line a, a?, Fig. 2, indicating the plane of section. Fig. 2, is a longitudinal central section of ditto.

Similar letters of reference in both views indicate corresponding` parts.

rhis invention consists in arranging over the exhaust pipe a rotary cylindrical plug with different sized openings which are brought to correspond with the openings in the-exhaust pipe and with the openings of the pipes leading therefrom to the chimney by means of gear wheels which are easily operated from the engineers stand and the whole is so arranged that the exhaust steam from the two cylinders is kept separate until it reaches the chimney and that the opening ot the exhaust pipe for each cylinder is varied separately.

To enable those skilled in the art to :fully understand, make and use my invention I will proceed to describe its construction and operation.

A, A, are the ends of the exhaust pipes leading from the two cylinders ot a locomotive engine or from some other double cylinder steam engine, and these two ends are divided by a partition B, and they are provided with openings a, a, which lead to short tubes C, C', which are rigidly attached to a shell D, and which leads into the chimney or smoke stack of the engine. The exhaust pipesl A, A', are secured to the shell D by means of a cap E, which is provided with ears b to correspond to similar ears c, which are attached to the shell D, and which give room for the screws CZ. Between the shell D, and the outside of the exhaust pipes A, A, is room enough left for a cylindrical plug E, which lits nicely over the pipes A, A', and into the shell D, and which is provided with a series of openings e, e, of differentsize which correspond in their po sition to the position of the openings a, a, and attached to the end of this plug is a cogwheel F, which is covered by the cap E, and which gears in a pinion G, which is attached to an arbor y, which has its bearing in the cap E and which is operated trom the engineers stand. The proportion of the pinion G and of the cog-wheel F, is such that for each halt revolution of the pinion a new set of openings e, c, in the plug is brought to register with the openings a, a, and with the tubes C, C. By these means the disadvantage existing with all the other variable exhausts now in use, namely, that the engineer can not know for certain when the variable openings register with the openings of the exhaust pipes, is in a great measure avoided, and any spring arising, if the plug should bind, is made up by making the openings a, a, and the tubes C, O, considerably larger than the openings e, e, so that even if the openings dont register quite perfect the steam passes out through the openings e, e', without obstruction. And, at the same time, the exhaust. steam from one cylinder is not obstructed by the exhaust steam from the other one, as both exhausts are kept entirely separate until they pass up into the chimney.

1What I claim as new and desire to secure `by Letters Patent is 

